Reed #4 Reservoir Report
Nearby: Reed #5 Haughian #16
Last Updated: December 6, 2025
Reed #4 is a privately owned earth dam located in Terry, Montana, along Sadie Creek.
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Summary
Completed in 1952 for irrigation purposes, this dam stands at a height of 16 feet and a length of 425 feet, with a storage capacity of 122 acre-feet. Despite being classified as low hazard potential and not yet rated for condition assessment, Reed #4 is regulated and inspected by the Montana Department of Natural Resources and Conservation (DNRC).
The dam's location in Custer County, Montana, falls under the jurisdiction of the state regulatory agency, with state permitting, inspection, and enforcement in place. With a primary purpose of irrigation, Reed #4 plays a crucial role in managing water resources in the region. The dam's condition assessment, emergency action plan, and risk management measures are yet to be fully evaluated, but it remains an essential structure for water supply and agricultural activities in the area.
While Reed #4 may not have a high hazard potential, its significance in providing irrigation water to the surrounding agricultural lands cannot be understated. As a key component of water resource management in the region, ensuring the proper maintenance and monitoring of this dam is essential for sustainable water use and climate resilience. As water resource and climate enthusiasts, it is important to recognize the vital role that structures like Reed #4 play in supporting local communities and ecosystems.
Year Completed |
1952 |
Dam Length |
425 |
Dam Height |
16 |
River Or Stream |
SADIE CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
16 |
Nid Storage |
122 |
Hazard Potential |
Low |
Nid Height |
16 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Reed #4